1# This file is included by the global makefile so that you can add your own
2# architecture-specific flags and dependencies.
3#
4# This file is subject to the terms and conditions of the GNU General Public
5# License.  See the file "COPYING" in the main directory of this archive
6# for more details.
7#
8
9OBJCOPYFLAGS    := -O binary
10LDFLAGS_vmlinux :=
11ifeq ($(CONFIG_DYNAMIC_FTRACE),y)
12	LDFLAGS_vmlinux := --no-relax
13	KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
14	CC_FLAGS_FTRACE := -fpatchable-function-entry=8
15endif
16
17ifeq ($(CONFIG_CMODEL_MEDLOW),y)
18KBUILD_CFLAGS_MODULE += -mcmodel=medany
19endif
20
21export BITS
22ifeq ($(CONFIG_ARCH_RV64I),y)
23	BITS := 64
24	UTS_MACHINE := riscv64
25
26	KBUILD_CFLAGS += -mabi=lp64
27	KBUILD_AFLAGS += -mabi=lp64
28
29	KBUILD_LDFLAGS += -melf64lriscv
30else
31	BITS := 32
32	UTS_MACHINE := riscv32
33
34	KBUILD_CFLAGS += -mabi=ilp32
35	KBUILD_AFLAGS += -mabi=ilp32
36	KBUILD_LDFLAGS += -melf32lriscv
37endif
38
39ifeq ($(CONFIG_LD_IS_LLD),y)
40	KBUILD_CFLAGS += -mno-relax
41	KBUILD_AFLAGS += -mno-relax
42ifndef CONFIG_AS_IS_LLVM
43	KBUILD_CFLAGS += -Wa,-mno-relax
44	KBUILD_AFLAGS += -Wa,-mno-relax
45endif
46endif
47
48# ISA string setting
49riscv-march-$(CONFIG_ARCH_RV32I)	:= rv32ima
50riscv-march-$(CONFIG_ARCH_RV64I)	:= rv64ima
51riscv-march-$(CONFIG_FPU)		:= $(riscv-march-y)fd
52riscv-march-$(CONFIG_RISCV_ISA_C)	:= $(riscv-march-y)c
53KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y))
54KBUILD_AFLAGS += -march=$(riscv-march-y)
55
56KBUILD_CFLAGS += -mno-save-restore
57KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET)
58
59ifeq ($(CONFIG_CMODEL_MEDLOW),y)
60	KBUILD_CFLAGS += -mcmodel=medlow
61endif
62ifeq ($(CONFIG_CMODEL_MEDANY),y)
63	KBUILD_CFLAGS += -mcmodel=medany
64endif
65ifeq ($(CONFIG_PERF_EVENTS),y)
66        KBUILD_CFLAGS += -fno-omit-frame-pointer
67endif
68
69KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
70
71# GCC versions that support the "-mstrict-align" option default to allowing
72# unaligned accesses.  While unaligned accesses are explicitly allowed in the
73# RISC-V ISA, they're emulated by machine mode traps on all extant
74# architectures.  It's faster to have GCC emit only aligned accesses.
75KBUILD_CFLAGS += $(call cc-option,-mstrict-align)
76
77ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
78prepare: stack_protector_prepare
79stack_protector_prepare: prepare0
80	$(eval KBUILD_CFLAGS += -mstack-protector-guard=tls		  \
81				-mstack-protector-guard-reg=tp		  \
82				-mstack-protector-guard-offset=$(shell	  \
83			awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \
84					include/generated/asm-offsets.h))
85endif
86
87# arch specific predefines for sparse
88CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS)
89
90# Default target when executing plain make
91boot		:= arch/riscv/boot
92ifeq ($(CONFIG_XIP_KERNEL),y)
93KBUILD_IMAGE := $(boot)/xipImage
94else
95KBUILD_IMAGE	:= $(boot)/Image.gz
96endif
97
98head-y := arch/riscv/kernel/head.o
99
100core-$(CONFIG_RISCV_ERRATA_ALTERNATIVE) += arch/riscv/errata/
101core-$(CONFIG_KVM) += arch/riscv/kvm/
102
103libs-y += arch/riscv/lib/
104libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
105
106PHONY += vdso_install
107vdso_install:
108	$(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@
109
110ifeq ($(KBUILD_EXTMOD),)
111ifeq ($(CONFIG_MMU),y)
112prepare: vdso_prepare
113vdso_prepare: prepare0
114	$(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso include/generated/vdso-offsets.h
115endif
116endif
117
118ifneq ($(CONFIG_XIP_KERNEL),y)
119ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_CANAAN),yy)
120KBUILD_IMAGE := $(boot)/loader.bin
121else
122KBUILD_IMAGE := $(boot)/Image.gz
123endif
124endif
125BOOT_TARGETS := Image Image.gz loader loader.bin xipImage
126
127all:	$(notdir $(KBUILD_IMAGE))
128
129$(BOOT_TARGETS): vmlinux
130	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
131	@$(kecho) '  Kernel: $(boot)/$@ is ready'
132
133Image.%: Image
134	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
135
136install: install-image = Image
137zinstall: install-image = Image.gz
138install zinstall:
139	$(CONFIG_SHELL) $(srctree)/$(boot)/install.sh $(KERNELRELEASE) \
140	$(boot)/$(install-image) System.map "$(INSTALL_PATH)"
141
142PHONY += rv32_randconfig
143rv32_randconfig:
144	$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/riscv/configs/32-bit.config \
145		-f $(srctree)/Makefile randconfig
146
147PHONY += rv64_randconfig
148rv64_randconfig:
149	$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/riscv/configs/64-bit.config \
150		-f $(srctree)/Makefile randconfig
151